5/10 TPTK on 3-suit flop

[cheet]

This is the beginning of my session and I have villan playing 28/18 so far (~80 hands). I'm playing about 21/17 but haven't had any big hands on this table so far.

Full Tilt Poker - No Limit Hold'em Cash Game - $5/$10 Blinds - 6 Players - (LegoPoker Hand History Converter)

Playing2Learn: $1,027.00
Hero: $1,012.00
LuisaNL: $1,952.75
holla-athca-boy: $3,823.00
Transkilla: $1,082.00
Crazy_Dolly: $1,139.00

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img] (6 Players)
LuisaNL folds, <font color="red">holla-athca-boy raises to $35.00</font>, Transkilla calls $35.00, Crazy_Dolly calls $35.00, Playing2Learn folds, <font color="red">Hero raises to $180.00</font>, 2 folds, Crazy_Dolly calls $145.00

Flop: ($435) A[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $300.00</font>, <font color="red">Crazy_Dolly raises all-in to $959.00</font>

Hard to imagine villan is every bluffing here. Does this pretty much have to be a set? AQ is kind of possible I guess but probably only with the Q[img]/images/graemlins/club.gif[/img]. Do most of you fold here?